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Modern periodic table and classification of elements

55 questions on Modern periodic table and classification of elements from the Periodic Table and Periodicity chapter: 11 NEET level, 22 JEE Main, 22 JEE Advanced. Each one opens with its answer and solution.

Practice this topic All Periodic Table and Periodicity topics

An element has atomic number 33. Another element lies in the same group of the long form of the periodic table but in period 6. Find the atomic number of this e... JEE Main level
Four species have 18 electrons each: P has Z = 20, Q has Z = 17, R has Z = 19 and S has Z = 16. Their sizes in increasing order are JEE Advanced level
Assume that orbitals fill strictly by the (n+l) rule, with the lower n first when (n+l) is equal, and ignore relativistic effects. The eighth period begins with... JEE Advanced level
How many d-block elements (counting Zn and Cd as d-block) are there among elements with atomic numbers 1 to 54? JEE Advanced level
Metalloids are counted as neither metals nor non-metals. Hydrogen and the noble gases are counted as non-metals. How many non-metals are there among the element... JEE Advanced level
An element has atomic number 20. Its group and period are NEET level
Which of the following is a metalloid? NEET level
Using the IUPAC rules for the temporary systematic naming of elements (applied before a permanent name is approved), the element with atomic number 109 would be... JEE Main level
A, B and C are consecutive members of group 14 of the long form of the periodic table, with A in period 3. The sum of the atomic numbers of A, B and C is JEE Advanced level
An element has the configuration [Xe] 4f^145d^106s^26p^2. It is in JEE Main level
Across period 5 the subshells are filled in the order JEE Main level
Which property is shared by beryllium and aluminium, an example of diagonal relationship? JEE Main level
Which element has its valence electrons only in an ns^2 configuration, yet is placed in group 18? JEE Main level
Using the IUPAC rules for temporary systematic names (used before a permanent name is approved), the element with atomic number 105 would be called NEET level
Element 119, if it is ever made, is expected to be placed in JEE Main level
The ion M^3+ is isoelectronic with argon. The element M lies in JEE Main level
Which one of the following sets consists entirely of d-block elements? JEE Main level
The ion X^2+ has the ground-state configuration [Ar] 3d^5. The element X belongs to JEE Main level
Which of the following atomic numbers correspond to p-block elements? JEE Main level
Which pair of atomic numbers belongs to the same group of the long form of the periodic table? JEE Main level
Select the correct statement(s) about periodic trends. JEE Advanced level
An element was given the temporary IUPAC systematic name ununhexium on the basis of its atomic number, before its permanent name was approved. Its atomic number... JEE Advanced level
Mendeleev's eka-silicon, whose properties he predicted before its discovery, is the element now called NEET level
Match the property (List I) with the diagonal pair (List II). List I: P. oxides amphoteric, carbide gives methane with water; Q. nitride formed directly with ni... JEE Advanced level
A not yet discovered element is given the temporary IUPAC systematic name unbinilium. Its atomic number and expected position are JEE Advanced level
The number of elements present in the sixth period of the long form of the periodic table is NEET level
Be and Al are a diagonal pair. Select the correct statement(s). JEE Advanced level
Approximate atomic masses are Na 23.0, Mg 24.3, C 12.0, N 14.0, O 16.0, F 19.0, Ar 39.9 and K 39.1. If elements were arranged strictly by increasing atomic mass... JEE Main level
Match the valence configuration (List I) with the type of element (List II). List I: P. [Xe] 4f^36s^2; Q. [Ar] 3d^24s^2; R. [Ne] 3s^23p^5; S. [Ar] 4s^2. List II... JEE Main level
According to the modern periodic law, the properties of elements are a periodic function of their NEET level
Mendeleev predicted an element 'eka-aluminium' with atomic mass near 68 and an oxide of formula E2O3. This element and its position in the modern long form tabl... JEE Advanced level
The number of groups in the p-block of the long form of the periodic table is NEET level
The ground-state configuration of palladium is [Kr] 4d^10 with no electron in 5s. Its group and period are JEE Advanced level
Which oxide of a third-period element is amphoteric? JEE Main level
An element has the valence shell configuration [Ne] 3s^23p^4. It is placed in NEET level
A trivalent cation M^3+ of an f-block element has the ground-state configuration [Xe] 4f^3 (the [Xe] core has 54 electrons). The atomic number of M and its peri... JEE Advanced level
A diagonal relationship is observed between NEET level
In the lanthanoid series the differentiating (last) electron enters the NEET level
Which one of the following is NOT usually classified as a metalloid? JEE Main level
Select the correct statement(s) about the temporary IUPAC systematic names (used before a permanent name is approved) of elements with Z greater than 100. JEE Advanced level
An element has the ground-state configuration [Ar] 3d^64s^2. It belongs to the NEET level
Four elements of the third period have valence configurations (i) 3s^1, (ii) 3s^23p^1, (iii) 3s^23p^3 and (iv) 3s^23p^5. Which has the highest first ionisation ... JEE Advanced level
Assume that orbitals fill strictly by the (n+l) rule, with the lower n filling first when (n+l) is equal, and ignore relativistic effects. Element 130 would the... JEE Advanced level
The differences in atomic number between successive members of group 17 (F, Cl, Br, I, At), going down the group, are JEE Advanced level
Li and Mg show a diagonal relationship. Select the correct statement(s). JEE Main level
Select the correct statement(s) about periods. JEE Advanced level
An element has atomic number 34. Its group and period in the long form of the periodic table are JEE Main level
An element has the configuration [Kr] 4d^105s^25p^3. Its group and period are JEE Main level
An element of the third period has successive ionisation enthalpies (in kJ mol^-1) 577, 1816, 2744, 11577 and 14842. The atomic number of the element is JEE Advanced level
Select the element(s) usually classified as metalloids. JEE Main level
Select the correct statement(s) about metals, non-metals and metalloids. JEE Advanced level
Select the correct statement(s) about the long form of the periodic table. JEE Main level
Select the correct statement(s) about the position of elements in the long form table. JEE Advanced level
An element has atomic number 43. Its group and period are JEE Advanced level
Select the correct statement(s) about the development of the periodic law. JEE Main level